Shark 35 from RSM kit. Power: Enya 40 XCS. Finish: Dope over silkspan. Weight: 47.5 ounces. Still some trimming out to do but flew complete pattern on third flight. Any tips from other users of this engine would be appreciated. A search shows 11x4 to 11x5 props on a 4-2-4 run seem to be the preferred setup. Best prop so far a Bolly Clubman 10.5x5 but still experimenting.

No, 11" is the max for this setup. Next prop I will try will be a CF Bolly 3 Blade 10 1/4 x 6 1/4. Engine seems to like to run a slight 4-2-4 break in the 9000-9500 rpm range. This prop may not work but it sure looks cool!

Pat Johnston (the guy that drew the plans for RSM) flew his with an OS 46LA. Pretty good plane.

It is definitely worth building and Pat did do a great job on the plans. I went with the Enya because I was impressed with the way it ran. It is the same size, weight, and mounting pattern as an AT-36 (still an option).  

Thanks Doc, the Shark actually has pretty large wheels. 2 1/4 mains, 1/ 3/4 nose and no problems at all flying off the moderately tall grass at our flying field. An 11" will be plenty of prop diameter for this engine, just have to find the right one.